How to prohibit mode safe mode for Windows 7 with the F8 key at startup of the operating system

Madam, Sir, I wrote the provider of credentials of vein recognition, similar to fingerprints recognition on Windows 7, in order to make the inaccessible unrecognized user connect to the computer.

My problem is that the user can access the computer according to the Mode safe mode with the F8 key at startup OS, how to forbid it?
On Windows XP, I can update the file c:\ntldr to prohibit the F8 key, but on Windows 7, I do not know how?
Please help me.
Thank you
Shinson Yang

See
A hotfix is available to block standard users to log on to a computer, Windows 7 or Windows Server 2008 R2-in safe mode
http://support.Microsoft.com/kb/977542

Tags: Windows

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